I used to work with someone who had a message telling people she only checked her email twice a day. You pretty much needed to call her if you needed anything outside of those times. (She worked in a remote office.) I think she had read one of those books on efficiency that recommended scheduled email time. But there were problems with this: 4. My department often had to email attachments or text to illustrate our questions/concerns. And we were on deadlines. Reading a page of text over the phone was not an efficient use of anyone’s time 5. She did outreach & was often out of the office on site visits, trainings, or travel to these places, but never ever set her OOO for these, because she was “working.” However, she was effectively not available to read emails from other staff until after hours on those days.
And that's it. Easy peasy, right? We know there are tons of genius out of office messages we missed, so if you've got a favorite don't forget to share it with us in the comments below!

But perhaps we have it all wrong, and are simply enslaving ourselves further to technology by toiling over OOOs that are personality-packed, marketing-friendly perfection. Maybe we need to be altogether more standoffish if we want to make our OOOs really work for us? NYU Professor Meredith Broussard, who’s the author of Artificial Unintelligence: How Computers Misunderstand the World, takes the inspiration for her OOO from US writer, poet and children’s author E.B. White, who once turned down an invitation from President Eisenhower with the words “I must decline, for secret reasons”. Accordingly, Broussard’s OOO reads simply: “I am out of the office, for secret reasons.”
Alternatively, some people will check their email while on vacation. Then, the text should indicate how often people may expect their email to be seen and acted upon.